Here is the full list of all 25 Diablo IV achievements.
Kill the most challenging Echo of Lilith.
Reach Level 100 with any character.
Upgrade your Healing Potion to max tier.
Complete a Sacred and Ancestral Nightmare Dungeon.
Acquire 10 Caches of Chaos from the Tree of Whispers.
Collect 1000 Aberrant Cinder in Helltide zones.
Get 5 PvP kills.
Explore all of Estuar.
Kill 50 enemies in melee range and 50 enemies out of melee range as a Rogue.
Kill 50 enemies while Berserking as a Barbarian.
Kill 50 enemies in Werebear form and 50 enemies in Werewolf form as a Druid.
Kill 100 enemies with Fire, Frost, or Lightning damage as a Sorcerer.
Imprint 10 items at the Occultist with an Aspect from the Codex of Power.
Craft any Elixir and any Incense.
Reach Level 50 with any character.
Reach Level 50 with a Hardcore character.
Kill 666 Demons, Fallen, or Goatmen.
Upgrade a piece of Armor, Jewelry, and a Weapon.
Kill 666 Snakes or Spiders.
Kill 666 Bandits, Cultists, or Knights.
Kill 666 Ghosts, Skeletons, or Zombies.
Summon 100 Skeleton Mages or Warriors as a Necromancer.
Kill 666 Drowned, Vampires, or Werewolves.
Complete the campaign.
Kill any World Boss.